/* =========================================================
   PrüfungsProfi FISI – Design System
   ========================================================= */

:root {
  --indigo:#4f46e5; --indigo-d:#4338ca; --violet:#7c3aed;
  --ink:#0f172a; --ink-2:#1e293b; --slate:#475569; --muted:#64748b;
  --line:#e2e8f0; --line-2:#cbd5e1;
  --bg:#f8fafc; --card:#ffffff;
  --ok:#16a34a; --ok-bg:#dcfce7; --warn:#d97706; --warn-bg:#fef3c7;
  --err:#dc2626; --err-bg:#fee2e2; --info:#2563eb; --info-bg:#dbeafe;
  --radius:14px; --radius-lg:22px;
  --shadow:0 1px 3px rgba(15,23,42,.08), 0 8px 24px -12px rgba(15,23,42,.18);
  --shadow-lg:0 20px 50px -20px rgba(79,70,229,.45);
  --grad:linear-gradient(135deg,#6366f1 0%,#7c3aed 55%,#a855f7 100%);
}

* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
a { color:var(--indigo); text-decoration:none; }
a:hover { text-decoration:underline; }
.container { width:min(1140px,92%); margin-inline:auto; }
.muted { color:var(--muted); }
img { max-width:100%; }
h1,h2,h3 { line-height:1.25; color:var(--ink); }

/* ---------- Header / Nav ---------- */
.site-header {
  position:sticky; top:0; z-index:50; background:rgba(255,255,255,.85);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--line);
}
.site-header__inner { display:flex; align-items:center; gap:1rem; height:64px; }
.brand { display:flex; align-items:center; gap:.55rem; font-weight:800; color:var(--ink); font-size:1.1rem; }
.brand:hover { text-decoration:none; }
.brand__mark { font-size:1.4rem; }
.brand__name { letter-spacing:-.02em; }
.site-nav { display:flex; align-items:center; gap:1.25rem; margin-left:auto; }
.site-nav a { color:var(--slate); font-weight:600; font-size:.93rem; }
.site-nav a:hover { color:var(--indigo); text-decoration:none; }
.nav-spacer { flex:0 0 1px; height:24px; background:var(--line); }
.nav-user { color:var(--ink); font-weight:700; font-size:.9rem; }
.nav-toggle { display:none; background:none; border:0; font-size:1.5rem; cursor:pointer; margin-left:auto; }

/* ---------- Buttons ---------- */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.7rem 1.25rem; border-radius:11px; font-weight:700; font-size:.95rem;
  border:1px solid transparent; cursor:pointer; transition:.15s; white-space:nowrap;
}
.btn:hover { text-decoration:none; transform:translateY(-1px); }
.btn--primary { background:var(--grad); color:#fff; box-shadow:0 6px 16px -6px rgba(99,102,241,.7); }
.btn--primary:hover { box-shadow:0 10px 22px -8px rgba(99,102,241,.8); color:#fff; }
.btn--ghost { background:#fff; color:var(--ink); border-color:var(--line-2); }
.btn--ghost:hover { border-color:var(--indigo); color:var(--indigo); }
.btn--light { background:rgba(255,255,255,.16); color:#fff; border-color:rgba(255,255,255,.3); }
.btn--light:hover { background:rgba(255,255,255,.26); color:#fff; }
.btn--sm { padding:.45rem .9rem; font-size:.86rem; border-radius:9px; }
.btn--lg { padding:.95rem 1.8rem; font-size:1.05rem; }
.btn--block { display:flex; width:100%; }
.btn[disabled]{ opacity:.5; cursor:not-allowed; transform:none; }

/* ---------- Flash messages ---------- */
.flash { margin-top:1rem; padding:.85rem 1.1rem; border-radius:11px; font-weight:600; font-size:.92rem; border:1px solid; }
.flash--success { background:var(--ok-bg); border-color:#86efac; color:#166534; }
.flash--error   { background:var(--err-bg); border-color:#fca5a5; color:#991b1b; }
.flash--info    { background:var(--info-bg); border-color:#93c5fd; color:#1e40af; }
.flash--warning { background:var(--warn-bg); border-color:#fcd34d; color:#92400e; }

/* ---------- Hero (Landing) ---------- */
.hero { position:relative; overflow:hidden; padding:5rem 0 4rem; }
.hero::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:
    radial-gradient(60% 50% at 80% 0%, rgba(124,58,237,.12), transparent 60%),
    radial-gradient(50% 40% at 0% 20%, rgba(79,70,229,.10), transparent 60%);
}
.hero__grid { display:grid; grid-template-columns:1.1fr .9fr; gap:3rem; align-items:center; }
.eyebrow {
  display:inline-flex; align-items:center; gap:.5rem; background:#eef2ff; color:var(--indigo-d);
  font-weight:700; font-size:.8rem; padding:.4rem .85rem; border-radius:999px; margin-bottom:1.2rem;
  border:1px solid #c7d2fe;
}
.hero h1 { font-size:clamp(2.1rem,5vw,3.3rem); letter-spacing:-.03em; margin:0 0 1rem; }
.hero h1 .grad { background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero p.sub { font-size:1.15rem; color:var(--slate); max-width:34ch; margin:0 0 1.8rem; }
.hero__cta { display:flex; gap:.8rem; flex-wrap:wrap; }
.hero__meta { margin-top:1.8rem; display:flex; gap:1.6rem; flex-wrap:wrap; color:var(--muted); font-size:.9rem; }
.hero__meta b { color:var(--ink); font-size:1.35rem; display:block; }

/* Hero card / countdown */
.exam-card {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg); padding:1.8rem; transform:rotate(.5deg);
}
.exam-card__top { display:flex; align-items:center; gap:.7rem; font-weight:700; color:var(--slate); }
.countdown { display:flex; gap:.6rem; margin:1.2rem 0; }
.countdown div { flex:1; background:var(--bg); border:1px solid var(--line); border-radius:12px; text-align:center; padding:.8rem .3rem; }
.countdown .num { font-size:1.8rem; font-weight:800; color:var(--indigo); line-height:1; }
.countdown .lbl { font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); }
.countdown-unit { margin-bottom:1rem; }
.countdown-unit .countdown { margin:.35rem 0 0; }
.countdown__head { display:flex; justify-content:space-between; align-items:baseline; gap:.5rem; }
.countdown__label { font-weight:700; color:var(--slate); font-size:.88rem; }
.countdown__date { font-size:.78rem; color:var(--muted); font-weight:600; white-space:nowrap; }
.exam-card ul { list-style:none; padding:0; margin:0; }
.exam-card li { display:flex; align-items:center; gap:.6rem; padding:.45rem 0; border-top:1px dashed var(--line); font-size:.92rem; }
.exam-card li:first-child { border-top:0; }
.check { color:var(--ok); font-weight:800; }

/* ---------- Sections ---------- */
.section { padding:4rem 0; }
.section--tint { background:#fff; border-block:1px solid var(--line); }
.section__head { text-align:center; max-width:640px; margin:0 auto 2.5rem; }
.section__head h2 { font-size:clamp(1.6rem,3.5vw,2.3rem); letter-spacing:-.02em; margin:0 0 .6rem; }
.section__head p { color:var(--slate); font-size:1.05rem; margin:0; }

/* ---------- Feature / generic cards ---------- */
.grid { display:grid; gap:1.2rem; }
.grid--3 { grid-template-columns:repeat(3,1fr); }
.grid--4 { grid-template-columns:repeat(4,1fr); }
.grid--2 { grid-template-columns:repeat(2,1fr); }
.card {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:1.5rem; box-shadow:var(--shadow); transition:.18s;
}
.card:hover { border-color:var(--line-2); transform:translateY(-3px); box-shadow:var(--shadow-lg); }
.card__icon { font-size:1.9rem; display:inline-grid; place-items:center; width:54px; height:54px; border-radius:14px; background:#eef2ff; margin-bottom:1rem; }
.card h3 { margin:.2rem 0 .5rem; font-size:1.15rem; }
.card p { margin:0; color:var(--slate); font-size:.95rem; }

/* ---------- Module cards ---------- */
.module-card { display:flex; flex-direction:column; }
.module-card .meta { display:flex; gap:.5rem; flex-wrap:wrap; margin:.4rem 0 .8rem; }
.tag {
  display:inline-flex; align-items:center; gap:.3rem; font-size:.72rem; font-weight:700;
  padding:.25rem .6rem; border-radius:999px; background:#f1f5f9; color:var(--slate); border:1px solid var(--line);
}
.tag--accent { background:#eef2ff; color:var(--indigo-d); border-color:#c7d2fe; }
.progress { height:8px; border-radius:99px; background:var(--line); overflow:hidden; margin-top:auto; }
.progress > span { display:block; height:100%; background:var(--grad); border-radius:99px; transition:width .4s; }
.progress-label { display:flex; justify-content:space-between; font-size:.8rem; color:var(--muted); margin:.7rem 0 .35rem; }

/* ---------- Pricing ---------- */
.price-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:1.2rem; align-items:stretch; }
.price { background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg); padding:2rem 1.6rem; display:flex; flex-direction:column; }
.price--featured { border:2px solid var(--indigo); box-shadow:var(--shadow-lg); position:relative; }
.price--featured::after { content:"Beliebt"; position:absolute; top:-12px; right:1.4rem; background:var(--grad); color:#fff; font-size:.72rem; font-weight:700; padding:.25rem .7rem; border-radius:999px; }
.price h3 { margin:0; font-size:1.2rem; }
.price .amount { font-size:2.4rem; font-weight:800; margin:.4rem 0; letter-spacing:-.02em; }
.price .amount small { font-size:.95rem; color:var(--muted); font-weight:600; }
.price ul { list-style:none; padding:0; margin:1.2rem 0; flex:1; }
.price li { padding:.4rem 0; border-top:1px solid var(--line); font-size:.92rem; color:var(--slate); }
.price li::before { content:"✓ "; color:var(--ok); font-weight:800; }

/* ---------- Auth ---------- */
.auth-wrap { min-height:calc(100vh - 64px); display:grid; place-items:center; padding:2.5rem 1rem; }
.auth-card { width:min(440px,100%); background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg); box-shadow:var(--shadow-lg); padding:2.2rem; }
.auth-card h1 { font-size:1.6rem; margin:0 0 .3rem; }
.auth-card .sub { color:var(--muted); margin:0 0 1.5rem; }
.field { margin-bottom:1rem; }
.field label { display:block; font-weight:600; font-size:.88rem; margin-bottom:.35rem; }
.field input, .field select, .field textarea {
  width:100%; padding:.7rem .85rem; border:1px solid var(--line-2); border-radius:10px;
  font-size:1rem; font-family:inherit; background:#fff; color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline:2px solid var(--indigo); outline-offset:1px; border-color:var(--indigo); }
.auth-alt { text-align:center; margin-top:1.3rem; font-size:.92rem; color:var(--muted); }

/* ---------- App shell (dashboard etc.) ---------- */
.page { padding:2.5rem 0 4rem; }
.page__head { margin-bottom:1.8rem; }
.page__head h1 { font-size:1.9rem; letter-spacing:-.02em; margin:0 0 .3rem; }
.page__head p { margin:0; color:var(--slate); }
.breadcrumb { font-size:.85rem; color:var(--muted); margin-bottom:.8rem; }
.breadcrumb a { color:var(--muted); }

.stat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:1rem; margin-bottom:2rem; }
.stat { background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:1.2rem 1.3rem; box-shadow:var(--shadow); }
.stat .k { font-size:.8rem; text-transform:uppercase; letter-spacing:.06em; color:var(--muted); font-weight:700; }
.stat .v { font-size:1.9rem; font-weight:800; color:var(--ink); letter-spacing:-.02em; }
.stat .v small { font-size:.95rem; color:var(--muted); font-weight:600; }

/* ---------- Lesson content ---------- */
.lesson-layout { display:grid; grid-template-columns:260px 1fr; gap:2rem; align-items:start; }
.lesson-nav { position:sticky; top:84px; background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:1rem; box-shadow:var(--shadow); }
.lesson-nav h4 { margin:.2rem 0 .6rem; font-size:.95rem; }
.lesson-nav ol { list-style:none; padding:0; margin:0; counter-reset:l; }
.lesson-nav li { margin:0; }
.lesson-nav a { display:flex; gap:.5rem; align-items:center; padding:.45rem .55rem; border-radius:9px; color:var(--slate); font-size:.88rem; }
.lesson-nav a:hover { background:#f1f5f9; text-decoration:none; }
.lesson-nav a.active { background:#eef2ff; color:var(--indigo-d); font-weight:700; }
.lesson-nav .done { color:var(--ok); }

.lesson-content { background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg); padding:2.4rem clamp(1.3rem,3vw,2.8rem); box-shadow:var(--shadow); }
.lesson-content h2 { font-size:1.45rem; margin:2rem 0 .8rem; padding-bottom:.4rem; border-bottom:2px solid var(--line); }
.lesson-content h2:first-child { margin-top:0; }
.lesson-content h3 { font-size:1.15rem; margin:1.5rem 0 .6rem; color:var(--indigo-d); }
.lesson-content p, .lesson-content li { color:#334155; }
.lesson-content ul, .lesson-content ol { padding-left:1.3rem; }
.lesson-content li { margin:.3rem 0; }
.lesson-content code { background:#f1f5f9; padding:.15em .45em; border-radius:6px; font-size:.9em; color:#be185d; font-family:"Cascadia Code",Consolas,monospace; }
.lesson-content pre { background:var(--ink); color:#e2e8f0; padding:1rem 1.2rem; border-radius:12px; overflow:auto; }
.lesson-content pre code { background:none; color:inherit; padding:0; }
.lesson-content table { width:100%; border-collapse:collapse; margin:1.2rem 0; font-size:.93rem; }
.lesson-content th, .lesson-content td { border:1px solid var(--line); padding:.6rem .8rem; text-align:left; vertical-align:top; }
.lesson-content thead th { background:#f8fafc; font-weight:700; }
.lesson-content tbody tr:nth-child(even) { background:#fafbfc; }
.lesson-content .tip { background:#eef2ff; border-left:4px solid var(--indigo); padding:.9rem 1.1rem; border-radius:0 10px 10px 0; margin:1.3rem 0; color:var(--ink-2); }
.lesson-foot { display:flex; justify-content:space-between; gap:1rem; margin-top:1.8rem; flex-wrap:wrap; }

/* ---------- Quiz ---------- */
.quiz-card { background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg); box-shadow:var(--shadow); padding:2rem; }
.quiz-q { font-size:1.2rem; font-weight:700; margin:0 0 1.2rem; }
.quiz-meta { display:flex; justify-content:space-between; align-items:center; margin-bottom:1.2rem; color:var(--muted); font-size:.9rem; }
.quiz-bar { height:6px; background:var(--line); border-radius:99px; overflow:hidden; margin-bottom:1.5rem; }
.quiz-bar > span { display:block; height:100%; background:var(--grad); transition:width .3s; }
.option { display:flex; align-items:center; gap:.8rem; border:1.5px solid var(--line-2); border-radius:12px; padding:.9rem 1.1rem; margin-bottom:.7rem; cursor:pointer; transition:.12s; font-size:1rem; }
.option:hover { border-color:var(--indigo); background:#fafaff; }
.option input { accent-color:var(--indigo); width:18px; height:18px; }
.option.is-correct { border-color:var(--ok); background:var(--ok-bg); }
.option.is-wrong { border-color:var(--err); background:var(--err-bg); }
.option.is-disabled { cursor:default; }
.explain { background:#f8fafc; border:1px dashed var(--line-2); border-radius:12px; padding:1rem 1.2rem; margin-top:1rem; font-size:.95rem; }
.explain.ok { border-color:#86efac; background:var(--ok-bg); }
.explain.no { border-color:#fca5a5; background:var(--err-bg); }

/* result */
.result-ring { width:160px; height:160px; border-radius:50%; display:grid; place-items:center; margin:0 auto 1.2rem;
  background:conic-gradient(var(--indigo) calc(var(--p)*1%), var(--line) 0); }
.result-ring__inner { width:124px; height:124px; border-radius:50%; background:#fff; display:grid; place-items:center; flex-direction:column; }
.result-ring__inner b { font-size:2rem; }

/* ---------- Flashcards ---------- */
.flash-stage { max-width:560px; margin:2rem auto; }
.flashcard { perspective:1400px; height:320px; cursor:pointer; }
.flashcard__inner { position:relative; width:100%; height:100%; transition:transform .55s; transform-style:preserve-3d; }
.flashcard.flipped .flashcard__inner { transform:rotateY(180deg); }
.flashcard__face { position:absolute; inset:0; backface-visibility:hidden; display:grid; place-items:center; text-align:center;
  padding:2rem; border-radius:var(--radius-lg); box-shadow:var(--shadow-lg); border:1px solid var(--line); font-size:1.3rem; font-weight:600; }
.flashcard__face--front { background:var(--card); }
.flashcard__face--back { background:var(--grad); color:#fff; transform:rotateY(180deg); font-weight:500; font-size:1.1rem; line-height:1.5; }
.flash-face-label { position:absolute; top:1rem; left:1.2rem; font-size:.72rem; text-transform:uppercase; letter-spacing:.1em; font-weight:800; opacity:.6; }
.flash-actions { display:flex; gap:.6rem; justify-content:center; margin-top:1.4rem; flex-wrap:wrap; }
.rate { padding:.65rem 1.1rem; border-radius:11px; font-weight:700; border:1px solid; cursor:pointer; background:#fff; }
.rate--again { border-color:#fca5a5; color:var(--err); }
.rate--hard  { border-color:#fcd34d; color:var(--warn); }
.rate--good  { border-color:#93c5fd; color:var(--info); }
.rate--easy  { border-color:#86efac; color:var(--ok); }
.rate:hover { transform:translateY(-1px); }

/* ---------- Tables (admin/list) ---------- */
.table { width:100%; border-collapse:collapse; background:var(--card); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); }
.table th, .table td { padding:.8rem 1rem; text-align:left; border-bottom:1px solid var(--line); font-size:.92rem; }
.table th { background:#f8fafc; font-weight:700; color:var(--slate); }
.table tr:last-child td { border-bottom:0; }
.badge { font-size:.72rem; font-weight:700; padding:.2rem .55rem; border-radius:999px; }
.badge--admin { background:#ede9fe; color:#6d28d9; }
.badge--user { background:#f1f5f9; color:var(--slate); }

/* ---------- Footer ---------- */
.site-footer { margin-top:3rem; background:var(--ink); color:#cbd5e1; padding:2.5rem 0; }
.site-footer__inner { display:flex; justify-content:space-between; gap:1.5rem; flex-wrap:wrap; align-items:center; }
.site-footer a { color:#cbd5e1; }
.site-footer a:hover { color:#fff; }
.footer-links { display:flex; gap:1.2rem; }
.site-footer strong { color:#fff; }

/* ---------- Utilities ---------- */
.center { text-align:center; }
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}
.row { display:flex; gap:1rem; flex-wrap:wrap; align-items:center; }
.spread { display:flex; justify-content:space-between; align-items:center; gap:1rem; flex-wrap:wrap; }
.hide { display:none !important; }
.lead { font-size:1.05rem; color:var(--slate); }

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero__grid,.lesson-layout { grid-template-columns:1fr; }
  .grid--3,.grid--4,.price-grid,.stat-grid { grid-template-columns:repeat(2,1fr); }
  .lesson-nav { position:static; }
  .exam-card { transform:none; }
}
@media (max-width:640px){
  .nav-toggle { display:block; }
  .site-nav {
    display:none; position:absolute; top:64px; left:0; right:0; flex-direction:column;
    align-items:stretch; gap:.2rem; background:#fff; border-bottom:1px solid var(--line);
    padding:.8rem 6%; box-shadow:var(--shadow);
  }
  body.nav-open .site-nav { display:flex; }
  .nav-spacer { display:none; }
  .grid--3,.grid--4,.price-grid,.stat-grid,.grid--2 { grid-template-columns:1fr; }
}

/* --- Lektions-Übung (Mastery-Quiz auf der Lektionsseite) --- */
.exercise-block { margin-top:2.5rem; padding-top:1.75rem; border-top:2px dashed var(--line); }
.exercise-block__head { margin-bottom:1rem; }
.exercise-block__head h2 { margin:0 0 .35rem; font-size:1.35rem; }
.exercise-block__head p { margin:0; }
.exercise-block .quiz-card { margin-top:.75rem; }
.exercise-block .tag { margin-left:.4rem; }

/* ---------- Kurs-Ansicht (lernen.php) ---------- */
.course-list { display:grid; gap:1.4rem; }
.course {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:var(--shadow); padding:1.6rem 1.7rem;
}
.course__head { display:flex; gap:1.1rem; align-items:flex-start; margin-bottom:.9rem; }
.course__icon { font-size:1.7rem; width:56px; height:56px; flex:0 0 auto; display:grid; place-items:center; border-radius:16px; background:#eef2ff; }
.course__info { flex:1; min-width:0; }
.course__kicker { display:flex; gap:.4rem; margin-bottom:.4rem; flex-wrap:wrap; }
.course__info h2 { margin:0; font-size:1.35rem; letter-spacing:-.01em; }
.course__info h2 a { color:var(--ink); }
.course__info h2 a:hover { color:var(--indigo); text-decoration:none; }
.course__sub { margin:.15rem 0 0; font-size:.9rem; }
.course__xp { font-weight:800; color:var(--indigo); white-space:nowrap; font-size:1.05rem; }
.course__xp span { color:var(--muted); font-weight:600; font-size:.85rem; }
.course__next {
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  background:#eef2ff; border:1px solid #c7d2fe; border-radius:12px;
  padding:.9rem 1.1rem; margin-top:1rem;
}
.course__next--done { background:var(--ok-bg); border-color:#86efac; }
.course__next-label { display:block; font-size:.74rem; text-transform:uppercase; letter-spacing:.07em; font-weight:800; color:var(--indigo-d); }
.course__next--done .course__next-label { color:var(--ok); }
.course__next strong { font-size:1.05rem; }
.course__lessons { margin-top:1rem; }
.course__lessons summary { cursor:pointer; font-weight:700; color:var(--indigo); font-size:.92rem; padding:.35rem 0; list-style:none; user-select:none; }
.course__lessons summary::-webkit-details-marker { display:none; }
.course__lessons summary::before { content:"▸ "; }
.course__lessons[open] summary::before { content:"▾ "; }
.course-lessons { list-style:none; margin:.6rem 0 0; padding:0; display:grid; gap:.45rem; }
.course-lesson {
  display:flex; align-items:center; gap:.8rem; padding:.55rem .8rem;
  border:1px solid var(--line); border-radius:11px; color:var(--ink);
  background:#fff; font-size:.93rem;
}
.course-lesson:hover { border-color:var(--indigo); text-decoration:none; background:#fafaff; }
.course-lesson__num { width:30px; height:30px; flex:0 0 auto; display:grid; place-items:center; border-radius:9px; background:#eef2ff; color:var(--indigo); font-weight:800; font-size:.85rem; }
.course-lesson.is-done .course-lesson__num { background:var(--ok-bg); color:var(--ok); }
.course-lesson.is-done .course-lesson__title { color:var(--muted); }
.course-lesson__title { flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-weight:600; }
.course__actions { display:flex; gap:.6rem; flex-wrap:wrap; margin-top:1.1rem; padding-top:1.1rem; border-top:1px dashed var(--line); }
@media (max-width:640px){
  .course__head { flex-wrap:wrap; }
  .course__next { flex-direction:column; align-items:flex-start; }
  .course-lesson { flex-wrap:wrap; }
  .course-lesson__title { white-space:normal; flex-basis:calc(100% - 46px); }
}

/* ---------- KI-Arbeitsblätter ---------- */
.ws-tasks { list-style:none; padding:0; margin:0; display:grid; gap:1.1rem; }
.ws-task { border:1px solid var(--line); border-radius:12px; padding:1.1rem 1.3rem; background:#fff; }
.ws-task__head { display:flex; justify-content:space-between; gap:1rem; align-items:baseline; margin-bottom:.5rem; }
.ws-task__head h3 { margin:0; font-size:1.05rem; color:var(--indigo-d); }
.ws-task__q { white-space:pre-line; color:#334155; }
.ws-task details { margin-top:.8rem; }
.ws-task summary { cursor:pointer; font-weight:700; color:var(--indigo); font-size:.9rem; }
.ws-solution { background:#f8fafc; border:1px dashed var(--line-2); border-radius:10px; padding:.8rem 1rem; margin-top:.6rem; font-size:.93rem; white-space:pre-line; }
.ws-scenario { background:#eef2ff; border-left:4px solid var(--indigo); padding:1rem 1.2rem; border-radius:0 10px 10px 0; margin:0 0 1.4rem; white-space:pre-line; color:var(--ink-2); }
.ws-loading { display:none; align-items:center; gap:.7rem; margin-top:1rem; color:var(--slate); font-weight:600; }
.ws-loading.show { display:flex; }
.spinner { width:22px; height:22px; flex:0 0 auto; border-radius:50%; border:3px solid var(--line); border-top-color:var(--indigo); animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }
@media print {
  .site-header, .site-footer, .ws-noprint, .flash, .nav-toggle { display:none !important; }
  .page { padding:0; }
  .lesson-content { border:0; box-shadow:none; padding:0; }
  .ws-task { break-inside:avoid; }
}

/* --- Admin: Subnavigation --- */
.admin-subnav { display:flex; flex-wrap:wrap; gap:.4rem; margin:0 0 1.5rem; }
.admin-subnav a {
  padding:.45rem .9rem; border-radius:9px; border:1px solid var(--line);
  color:var(--muted); font-weight:600; font-size:.9rem; text-decoration:none; background:#fff;
}
.admin-subnav a:hover { border-color:var(--accent); color:var(--accent); }
.admin-subnav a.active { background:var(--accent); border-color:var(--accent); color:#fff; }